Robert hitchcock



utenti titre;

it'trh taten 'ROBERT' HiTeHeooK, or srurNerIuLn, MAss'AeHusu'rrs.

Letters Patent No. 75,910, dnt-eel lPIarct 24, 1868.

IMPROVEMENT IN GAR-VENTILATOR.

TO ALL WHOM` IT MAY CONGERN Be it,known that I, ROBERT Hl'reicoel, of Springfield, IIani-pden county, Commonwealth of Massachusetts, have invented a new and useful Improved Car-Ventilator; and I do hereby declare that the following is. a full andclear'dosoription thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon. In the drawings- Figure 1 is a sectional view of my ventilator, and

Figure 2 is "a diagram, showing the manner of applying it.

This invention consists of a car-ventilator, which has for its principle an indirect passage for the air, and a. deiiectorfo'r the cinders und dirt, and so arranged upon thefcar thattwo essential offices for ventilationtheexhaustingoffthe inner atmosphere, and supplying of fresh from the outside-are performed by the sume com; struction of ventilator in die'rent relative positions,l

lIn thogdrawings, it is seen that 'the lig. 1 shows a delieetor, A, opposite to the main opening B, and extending downwards, in a slanting direction, tothe lower part, H,- ot the passage, at the other end from the opening I3. At the partII is a. small opening left for the cind'ers and trash in'the air to go through. The deilcetor H does not reach the topwpart of the passage, but a space is left open above its upper edge atgC. Afront deiieetor, D, reaches fromthe front top edge of the ease or passage to about a third of the distance between it and the lower side, slanting also in about the'A saine angle as the deliector A. This brings the lower'etlge of the front deector D on alower plane than the top edge of the one, A, and thus produces a lap that maybe varied at discretion. In. the side, E, of the case where it. is placed to the car, and is opposite the vent in the same,v is an opening, F, to let the air through, in orout et` the car, as the caso may be. A lip, K, is attached to oiforms' part of thelower edge oi" the ldeiltnctor'A, and-projects to the rear of the ventilator; This, however, when the vdevice is an exhaustfprevnts the air from going' into the hole II, and may be extended, as shownby red lines,

(fig. 1,) until it is long enough to produce a suction "at this end of the oase. This lip may be varied, howet'er, in angle and length, to suit the requirements of the occasion. l

.The m'annervof applying this device to the car, so as to produce the exhaust and supply, is-as foliows: The ventilators are arranged alternately with their muiuj openings facing each other, the rest of the ventilator being correspondingly reversed in construction. Now, when the eur travels in thodirection showniby the red `arrow, the ventilators indicated by1 the even numbers, 2, 4,' Sie., catch the air, and force it into the car through the vent-holes I?, the cinders being deflected by the dcileetor A, and passing'through'the hole at H. VThe other,

case, suhstantiallylas shown.

. supply, as the c'ar moves in either direction,respectively.

ventilators, 1, 3, 5, 82e., are now "acting as exhausts, and, by means o f the suction produced by thcirrapidly moving against the air, they draw the airfrom th'c car. When the car travels, however, in the direction shown by the black arrow, the action of the ventilators is reversed, 2, 4, Sie., new becoming exhausts, and 1,3, 5, the supply. f n The case of rentilatorimay be Amade of any convenient form, although I-prefer, for the sake ldi' appearance, a semi-cylindrical forni, as shown i'n the sectional end view ofl'FigureB.

A The advantages of this ventilator are that it, by proper `arrangement, performs two -oiccs gaand it is not liable to get out of order, having nopvnlve to work in it and it makes no noise. v

Non', having described my.inventon,what I claim as new, and desire to secure by Letters Patent, is--f 1. In a earventilator,"the conrbinatiorifof the d eflcetor A, deilcctor D, and vent F, arranged in an outside `2'. The arrangement ,of alternately-reversed ventilators, I, 2, 3, 4, Sac., producing alternately exhaust and' i noB'r. urrcucoeit.

Witnesses:

Entrano H. HYDE, WM. H. BnAnxutr. 

